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Public-ready6/28/2026

Vitamin C

Papers analyzed
106
Glucose and metabolic health markersCholesterol and triglyceridesBlood-Level or Deficiency Marker
What to look for in this research

Glucose and metabolic health markers is closer to a research marker, so it should be read separately from a directly felt benefit.

Main benefit evidence

Review human evidence by goal.

Glucose and metabolic health
Glucose and metabolic health markers
Measured outcomes: Glucose and metabolic markers

This card is closer to a measured biomarker or lab outcome than a directly felt user benefit. These findings come from a defined study population, so everyday effects may differ.

Goal tierNot rated yet

No direct evidence for general supplement use is confirmed under the current standard.

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Blood lipids
Cholesterol and triglycerides
Measured outcomes: Cholesterol and triglycerides

Potential benefit studied in Blood lipids. These findings come from a defined study population, so everyday effects may differ.

Goal tierNot rated yet

No direct evidence for general supplement use is confirmed under the current standard.

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Nutrient status and deficiency
Blood-Level or Deficiency Marker
Measured outcomes: Blood level or deficiency correction markers

This is based on lab markers such as blood levels, deficiency correction, or absorption. Read it separately from directly felt outcomes.

Goal tierNot rated yet

No direct evidence for general supplement use is confirmed under the current standard.

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Immune and respiratory health
Immune and respiratory support
Measured outcomes: Immune and respiratory support

Potential benefit studied in Immune and respiratory health. These findings come from a defined study population, so everyday effects may differ.

Goal tierNot rated yet

No direct evidence for general supplement use is confirmed under the current standard.

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Bone and joint health
Bone, joint, and mobility
Measured outcomes: Bone, joint, and mobility

Potential benefit studied in Bone and joint health. These findings come from a defined study population, so everyday effects may differ.

Goal tierNot rated yet

The currently linked research coverage is not broad enough to characterize this goal yet.

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Blood pressure and vascular health
Blood pressure and vascular health markers
Measured outcomes: Blood pressure and vascular markers

This card is closer to a measured biomarker or lab outcome than a directly felt user benefit. These findings come from a defined study population, so everyday effects may differ.

Goal tierNot rated yet

The currently linked research coverage is not broad enough to characterize this goal yet.

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What does a research result actually tell you?

Reading research

Side effects and combination findings in studies

Findings from studies of this ingredient alone are separated from findings involving another supplement or medication.

Caution signals
5
Side effects + combos + curated rules
Key precautions
No curated contraindication rule is available yet, but literature caution signals are shown below.
1 combo signals and 0 added-signal combos shown below.
These are signals reported in studies. They do not predict what will happen to an individual.

Findings to review with care

Side effects reported for the ingredient alone are separated from findings involving another supplement or medication.

Side effects reported when this ingredient was used alone

Symptoms or adverse events reported in studies of this ingredient without another active ingredient.

Adverse effect signal1 papers
High-dose vitamin C therapy has been reported to cause secondary calcium oxalate nephropathy, worsen acute kidney injury, and delay renal recovery in non-burn patients, and a case series in burn patients identified calcium oxalate nephropathy after high-dose vitamin C therapy.Human studies · Study type not identified
Adverse effect signal1 papers
High-dose vitamin C supplementation is reported to increase urinary oxalate, which may increase the risk of hyperoxaluria and oxalate kidney stones.Human studies · Study type not identified
Adverse effect signal1 papers
Contraindications for high-dose ascorbic acid are mentioned, including calcium oxalate urolithiasis, phenylketonuria, primary hemochromatosis, G6PD deficiency, and thalassemia.Human studies · Study type not identified
Adverse effect signal1 papers
High-dose ascorbic acid is reported to increase serotonin via tryptophan hydrolysis, which may cause sensitization to pain through pro-nociceptive serotonin receptors.Human studies · Study type not identified
Adverse effect signal1 papers
Calcium ascorbate EC showed better tolerability and fewer epigastric adverse events compared to ascorbic acid.Human studies · Study type not identified

Positive combinations studied

Positive combination findings are separated by how the study compared the groups. This is not a recommendation to combine them.

Positive findings when used together

The combination had a positive result, but the contribution of each ingredient could not be separated.

비타민 EIn a triple-blind RCT of 60 women with endometriosis, daily supplementation with 1000 mg Vitamin C and 800 IU Vitamin E for 8 weeks significantly reduced pelvic pain, dysmenorrhea, and dyspareunia (p < 0.001) compared to placebo.